Bug in gaussian mutation operator anyoptimization#481

Skylake37 · Oct 6, 2023 · 99de7d7 · 99de7d7
1 parent 7d63118
commit 99de7d7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pymoo/operators/mutation/gauss.py b/pymoo/operators/mutation/gauss.py
@@ -25,7 +25,7 @@ def mut_gauss(X, xl, xu, sigma, prob):
     _xu = np.repeat(xu[None, :], X.shape[0], axis=0)[mut]
     sigma = sigma[:, None].repeat(n_var, axis=1)[mut]
 
-    Xp[mut] = np.random.normal(X[mut], sigma * (_xu * _xl))
+    Xp[mut] = np.random.normal(X[mut], sigma * (_xu - _xl))
 
     Xp = repair_random_init(Xp, X, xl, xu)